Re: Errors in redisplay in eww

[Ivan Shmakov <ivan@siamics.net>]

>>>>> Eli Zaretskii <eliz@gnu.org> writes:
>>>>> From: Lars Ingebrigtsen  Date: Tue, 29 Dec 2015 17:16:05 +0100
>>>>> Eli Zaretskii <eliz@gnu.org> writes:

 >>> When browsing this page:

 >>> https://news.ycombinator.com/reply?id=10801669&goto=item?id=10801368

 >>> I see a lot of error messages in *Messages*:

 >>> Invalid face reference: nil [329 times]
 >>> Invalid face reference: nil [2000 times]

 >> I don't get any such errors (running under Linux).  Could you see
 >> what face it is that's nil?

 > The face is (nil (:background "#ffffff")), and the problem happens
 > when we try to merge its car (which is nil, not a valid face).

	If I’m reading the code correctly, the 'face property value is
	set to either a font or the value returned by the
	shr-face-background function, /or/ the value passed to
	shr-add-font is prepended to the current face list.  Could you
	please try doing, say, trace-function-background on these two
	functions and see if the former ever returns anything suspicious
	(like the list above; and for what inputs), or if the latter is
	ever called with a nil TYPE argument?

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